Fishbone Cactus (Selenicereus anthonyanus)

Fishbone Cactus

Selenicereus anthonyanus

Its zigzag stems mimic fishbones, a whimsical trailing succulent. Epiphytic cactus; common name: Rick Rack Cactus.

Partial sun
1–2/week
Beginner
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Plant Needs

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Sunlight Bright indirect light; avoid direct midday sun to prevent stem scorching
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Watering Water thoroughly when the top 2–3 cm of soil is dry; avoid overwatering to prevent root rot
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Temperature Thrives at 18–27°C; protect from temperatures below 10°C to avoid cold damage
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Characteristics

  • Leaf: Modified flat stems with zigzag edges, dark green, fleshy and segmented
  • Flower: Large, fragrant white nocturnal blooms up to 30 cm in diameter
  • Root: Thin aerial roots for anchoring to host plants in natural habitats
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Horticulturist's Insider Field Notes (No AI Fluff)

The Golden 'Finger Test' Rule

Never water on a strict calendar. Stick your index finger 2 inches into the soil. If it feels cool and damp, wait 2–3 days. If bone dry, water thoroughly until it drains from the bottom holes.

Empty the Saucer After 20 Minutes

The #1 houseplant killer is water sitting in the catch tray. Stagnant runoff water starves roots of oxygen and causes root rot.

Turn the Pot Every 2 Weeks

Houseplants naturally lean toward the nearest window light. Give the pot a quarter-turn biweekly to maintain balanced, symmetrical architecture.

Wipe the Dust Away

Dust on leaves acts like a heavy sunshade. Gently wipe broad foliage with a damp cloth monthly to maximize photosynthesis and air purification.

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Care Guide

Watering

Keep soil slightly moist but not soggy; mist occasionally to boost humidity

Fertilization

Diluted cactus fertilizer once monthly. Use a balanced, low-nitrogen fertilizer to support flowering without promoting soft, weak growth

Banana peel tea:Soak chopped banana peels in water for 3 days; dilute 1:20 for root drench; strain to remove solids to avoid pest attraction
Pruning
  • Trim overgrown stems in early spring to maintain desired trailing shape
  • Remove yellow or mushy segments immediately to prevent rot spread
  • Pinch back stem tips to encourage bushier, fuller growth
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Pet & Human Toxicity & Emergency Guide

🟢 Pet-Safe (Non-Toxic to Cats & Dogs)

Pet Safety Verified: According to clinical veterinary databases (ASPCA), Fishbone Cactus (Selenicereus anthonyanus) is non-toxic to both cats and dogs, making it an excellent choice for pet-friendly homes.

Pet Tolerance

Leaves, stems, and flowers contain no systemic toxins or hazardous oxalates; safe for curious puppies and kittens.

Mild Fiber Sensitivity

While non-toxic, excessive consumption of fibrous leaves may cause mild, temporary stomach upset or regurgitation.

Recommended Placement

Safe for low tables, living rooms, and active pet environments.

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Troubleshooting & Common Plant Problems

Quick diagnostic guide for common care issues affecting Fishbone Cactus (Selenicereus anthonyanus):

Yellowing Leaves

Most commonly caused by overwatering or poor drainage. Ensure topsoil dries out between waterings and check for root ventilation.

Brown or Crispy Leaf Tips

Low ambient humidity, hard tap water minerals, or direct midday sunburn. Increase humidity and use filtered water.

Drooping or Wilting Foliage

Indicates dehydration or root damage from prolonged waterlogging. Inspect soil moisture and root firmness.

Common Pests (Spider Mites, Aphids)

Dry indoor air encourages pests. Wipe leaves with a damp cloth and treat with insecticidal soap or neem oil.

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Propagation & Repotting Guide

  • Taking Cuttings: During active spring or summer growth, take a healthy 4–6 inch cutting just below a node using clean shears.
  • Rooting Medium: Place cuttings in fresh water or moist perlite mix in bright, indirect light; refresh water weekly.
  • Potting Up: Transplant into well-draining potting mix once roots reach 2 inches in length (typically 3–5 weeks).
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Seasonal Care Calendar

  • Spring & Summer (Active Growth): Water thoroughly as topsoil dries; apply diluted balanced fertilizer monthly; encourage steady growth.
  • Autumn (Transition): Gradually reduce watering frequency as daylight hours shorten; discontinue fertilization.
  • Winter (Dormancy): Water sparingly only when soil is mostly dry; protect from cold window drafts; keep in warm room.
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Frequently Asked Questions

How often should I water my Fishbone Cactus?

Water thoroughly when the top 1–2 inches of soil feel dry. In active growth (spring/summer), water every 1–2 weeks; reduce significantly in winter.

Where is the best indoor location for Fishbone Cactus?

Position in bright, filtered indirect light (e.g., near an east or south-facing window with sheer curtains). Avoid harsh direct midday sun.

Is Fishbone Cactus toxic to pets?

ASPCA confirmed non-toxic to cats

When should I repot my Fishbone Cactus?

Repot every 1–2 years in spring when roots outgrow the drainage holes or the soil depletes nutrients.

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Garden Uses & Culture

Culture: Symbolizes adaptability and whimsy in modern indoor gardening

Usage: Ornamental hanging plant for indoor decor; grown for unique foliage and rare nocturnal blooms

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